LXer: DDG, their own search, not just a proxy.
 

Published at LXer:

DuckDuckGo gets its results from over one hundred sources, including DuckDuckBot (their own crawler), crowd-sourced sites (like Wikipedia, which are stored in their own index), Yahoo! (through BOSS), Yandex, WolframAlpha, and Bing. For any given search, there is usually a vertical search engine out there that does a better job at answering it than a general search engine.

Read More...